I find it really strange that there's so much variety with dps job mechanics, and yet we don't see tanks really exploring any of them. MCH has an interesting variation on the standard combo system in that Drill and Air Anchor are functionally additional 'combo steps' that pop up at different points in your combo cycle. DRG has a five step combo. There are so many more interesting ways to do combo systems than merely alternating between a maintenance combo and a damage combo. It's a shame that more of this doesn't get ported over to tanks. Who knows, you might even be able to make a job like WAR engaging to play for the other 80 seconds when you aren't in burst.

Likewise, MCH and now RPR are both operating on purely resource-gated burst windows, rather than the standard time-gated ones that everyone else has. I think that this sort of design better suits a resource-focused job. It's more organic.